摘要
甲醛作为室内空气污染物之一,对人体产生的危害不可逆转。因此,高效去除甲醛成为研究热点之一。该研究采用共沉淀法得到不同活性的Mn_(x)Zr_(1-x)O_(y)催化剂,利用XRD、FT-IR、SEM、TEM、BET、XPS、O2-TPD等方法对材料进行了表征分析,评价了不同锰锆摩尔比在室温下催化氧化甲醛的影响效果。结果表明,锰与锆的摩尔比为2∶1时反应得到的Mn_(0.67)Zr_(0.33)O_(y)催化氧化甲醛效果最好,去除率达到100%,反应50 h后催化剂的活性仍在90%以上。表征结果表明,Mn_(0.67)Zr_(0.33)O_(y)催化剂拥有最大的比表面积(215.1 m^(2)·g^(-1)),加大了气体与催化剂的接触面积,表面活性氧和高价态Mn含量高成为催化剂性能优异的主要原因。
Formaldehyde,as one of the indoor air pollutants,produces irreversible harm to the human body.Therefore,the removal efficient of formaldehyde has become one of the research hotspots.In this study,Mn_(x)Zr_(1-x)O_(y)catalysts with different activities were obtained by the co-precipitation method,and the materials were characterized by XRD,FT-IR,SEM,TEM,BET,XPS and O2-TPD.Effect of different manganesezirconium molar ratios for the catalytic oxidation of formaldehyde at room temperature were evaluated.The results showed that catalytic oxidation effect of formaldehyde by Mn_(0.67)Zr_(0.33)O_(y)obtained from manganese and zirconium at a molar ratio of 2∶1 was the best,with the removal rate of formaldehyde reaching 100%,and the catalytic activity was above 90%after 50 h of reaction.The characterization results showed that the Mn_(0.67)Zr_(0.33)O_(y)catalyst possessed the largest specific surface area(215.1 m^(2)·g^(-1)),which increases the contact area between the gas and the catalyst,and high surface-activated oxygen and high valence Mn content are the main reasons for the excellent performance of the catalysts.
作者
唐瑞玖
施辉秋
郑振
贾丽娟
刘天成
TANG Ruijiu;SHI Huiqiu;ZHENG Zhen;JIA Lijuan;LIU Tiancheng(College of Chemistry and Environment,Yunnan Minzu University,Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department,Kunming 650504,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2024年第10期2869-2877,共9页
Chinese Journal of Environmental Engineering
基金
云南省中青年学术技术带头人储备人才项目(202105AC160054)。
作者简介
第一作者:唐瑞玖(1999-),女,硕士研究生,研究方向为大气污染控制,17608714739@163.com;通信作者:刘天成(1976-),男,博士,教授,研究方向为大气污染控制,liutiancheng76@163.com。
